Its atmosphere is thick hydrogen, helium, and some methane, the methane gives it a green-blue appearance.  Uranus also has clouds blowing in bands around it, with wind speeds that can reach up to 900 kilometers per hour.

Uranus’ inner moons are half water ice and half rock. The composition of the other moons is unknown, they may be captured asteroids. Uranus has two sets of thin narrow rings.

Most likely knocked over from an early collision, Uranus is tilted on its side and rotates horizontally lying on its side.

The upper-level clouds temperature is – 224° C. Uranus is the coldest planet due to its distance but also to having a colder core than the other gas giants.

Uranus has 27 known moons. Most moons take their names from Greek or Roman mythology, however, Uranus’ moons are named after characters from the writing of both William Shakespeare and Alexander Pope.

Exploration

• 1989: Voyager 2 has been the only spacecraft to visit Uranus

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